It makes sense comparing Sony STR-DH590 vs Onkyo TX-8020 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Sony STR-DH590 has 5.2 versus 2.0 for Onkyo TX-8020. Regarding power, then STR-DH590 has such a W/Ohm ratio - 145/6 when TX-8020 has a power of 90/6. The THD is 0.09% for the STR-DH590 but 0.03% for the TX-8020.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/32-bit for STR-DH590 and 192 KHz/24-bit for the TX-8020. None of the models support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Both models do not have WI-FI support. Only the STR-DH590 has Bluetooth support. Competitors do not have built-in Spotify service. Only the STR-DH590 provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the STR-DH590. Only the STR-DH590 supports HDMI Audio Return Channel (ARC). Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the STR-DH590. The TX-8020 has a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is not present in each of the AV receivers. Unfortunately, the setup assistant is not available in each of the models.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.
The Sony STR-DH590 is better receiver in this comparison. Check Sony STR-DH590 price